Rotary oil or hydrocarbon burner



April 2, 1929. J. SCHEMINGER, JR

ROTARY OIL 0R HYDHOCARBON BURNER Filed May 25. 1925 2 Sheets-Sheet April2, 1929 J. SCHEMINGER, JR

ROTARY OIL 0R HYDROCARBON BURNER Filed May 23, 1925 2 Sheets-SheetlllliIIIII;IIIIIIIIIIIIIIIIIIIII Patented Apr. 2, 1929.

UNITED STATES PATENT OFFICE.

JOHN SCHEHINGER, JR.,'OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO AETNAAUTO- KATIC OIL BURNER, INCORPORATED, OF PROVIDENCE, RHODE ISLAND, ACORPO- RATION OF NEW YORK.

ROTARY OIL OR HYDROCARBON BURNER.

Application filed May 23, 1925. Serial No. 32,354.

the type known in the art as centrifugal or rotary oil burners.

The main ob]ect of the inventiorilis to provide in a rotary oil burnersimple "and efli-.

cient means for introducing fuel oil and steam atthe point of deliveryto the burner in such manner as to effect a thorough atomization of theoil and the commingling of steam therewith so as to promote combustionand prevent the formation or deposit of carbon within or upon the rotarburner head.

The invention will first e hereinafter more particularly described, withreference to the accompanying drawings, which are to be taken as a partof this specification, and then pointed out in the claims at the end ofthe description.

In said drawings, Fig. 1 is a vertical sectional elevation of acentrifugal or rotary oil burner illustrating a preferred form ofembodiment of my invention; some parts of the device being broken away;

Fig. 2 is a plan view;

Fig. 3 is a fragmentary detail sectional I view on a slightly enlargedscale of the stationary discharge nozzle and parts associated therewithand with the rotary burner head; and

Fig. 4 is a vertical sectional view illustrating a modfication of theinvention.

Referring to said drawings, in which the same reference letters are usedto denote corresponding parts in different views, the letters A and Adenote top and bottom plates of the rotary head of a centrifugal liquidfuel burner mounted on a vertical hollow shaft B which extends lipthrough a central opening in the base of the combustion chamber C, whichis designed to be arranged within the surrounding walls of a furnace ofordinary construction in a well known manner; said combustion chamberconsisting of a body of fire brick or other refractory mateialsupporting a fire ring I); said body being supported upon an underlyingcurved metallic plate D having a central circular opening therein with adepending annular flange overlapping and fitting within and resting uponthe outer upper edge of a circular trough-like casting E surrounding theshaft B; said casting E having apertured lugs e on its innercircumferential wall with fastening bolts therein for securing it toapertured lugsj projecting from a hollow standard or casting'F withinwhich the shaft B has its bearings; said shaft having a gear wheel fthereon in mesh with a gear wheel or worm gear 9 on a driving shaft Gfor imparting rotary motion to the burner head. The burner headcomprises said top and bottom plates A and A. preferably of annular formwith substantially concave confronting surfaces. and a subjacent fanwheel A fixed on the same shaft. Said top plate as shown has a dome-likecentral portion a with its lower edge surrounding an upstanding flange0, on a ring-shaped member overlying and spaced from and secured to theaforesaid bottom plate A which has its central portion a'-Z depressedand supported upon 4 an annular outwardly and upwardly extending flangeon the lower end of a hub-like member or sleeve I fixed on the upper endof the hollow shaft B, so as to revolve there.- with. An oil feed pipe Kextends up through said hollow shaft and carries on its upper end adischarge nozzle L; the lower end of said feed pipe being screwed into ahollow casting M fixed within the lower end of the hollow standard F soas to support the feed pipe stationarily within the hollow shaft B. Thedelivery nozzle L consists of a substantially semi-globular body havinga liquid fuel and vapor receiving and mixing chamber Z therein and anapertured bottom plate screwed on the upper end of said feed pipe andformed or provided with a plurality of depending tubular projectionseach having a discharge tube therein formed with a restricted passagetherethrough, preferably a tube of the Venturi type, for dischargingjets of commingled oil and steam onto and around the central depressedportion of said bottom plate A. The space between the top and bottomplates A and A is gradually enlarged from the peripheral portion thereof toward the center, and the peripheries of the two plates are slightlyseparated so as to provide a restricted peripheral discharge passage forthe gaseous fuel or atomized oil and steam issuing from the burner headthrough said passage and the periphery of the upper plate extendsslightly beyond the periphery of the lower plate so that the gaseousfuel will be discharged in a thin layer or sheet and thrown outhorizontally into the space within the fire ring aroimd the burner headand against the vertical walls of said ring,-and as the combustiblegases are con- 'sumed adjacent to the inner side of said iquid fuel orfuel oil by means such as I will now proceed to describe. I As shown, apipe P connected at one end with a water tank or other source of supplyI (not shown) is coiled around the fire ring D,

preferably on the upper outer side thereof, which is recessed to receiveand provide a shoulder 'on which the coil may rest. Said ipe extendsdownwardly to a coupling memr p, for connection with a reduced extensionor pipe P of diminutive size which extends throu'gh a stufling box R ina horizontal portion is of the oil feed pipe and along said pipe andupwardly through the vertical portion thereof and terminates withinthe-receiving and mixing chamber of the discharge nozzle so as tointroduce steam in said chamber for admixture with the liquid fueltherein at the point of delivery of'the liquid, and the steam thusintroduced serves to atomize the'fuel oil, and the intense heat actingupon the vaporized oil and steam is suing from-the discharge nozzle andfilling the space between the top of the nozzle and the underside of thetop plate A serves to superheat the steam within and issuing from themixing chamber, whereby any partially atomized oil that may escape isbroken up and atomized by the superheated steam with which it isthoroughly commingled and the mixture thus produced is evenlydistributed around and within the space encircled by the fire ring so asto insure complete combustion and the generation of intense heat forheating the water pipe surrounding the fire ring and generating steamtherein for delivery to the mixing chamber within the discharge nozzle;the rotating burner head being rapid- 1y driven so that the commingledoil-gas and steam is thrown out from between the peri heries of the topand bottom plates thereot at a high velocity in a plane parallel to theflat horizontal peripheral portions of said plates and perpendicular tothe fire ring; the speed of rotation being sufiiciently high to impartto the outgoing oil-gas and steam a high velocity, which will preventback firing into the space within the rotating head, and thus preventthe formation and de osit of carbon on the interior of the rotating pates and within the nozzle housed between said plates, also preventinginjurious vibration, which results from imperfect atomization of theoil, and consequent return of unburned gases to the interior of therotating burner ead, resulting in the deposit of soot or carbon therein.

In Fig. 4 of the drawings I have shown a modification in which thechambered discharge nozzle is omitted, and the feed-water pipe P extendsfrom a source of supply up through the base portion of the fire ring andhas a vertical coil P formed therein adjacent the inner wall of the firering, and from said coil the pipe extends to and through the center ofthe top plate of the burner head in which is formed an aperture to receive a down-turned end portion of the pipe, which terminates at a pointdirectly above the inlet end of the fuel feed pipe, which enters thespace between the top and bottom plates of the burner head underneathsaid terminal, so that as the li uid fuel issues from the oil feedv pipea jet 0 steam coming from an opposite direction will be injected intothe incoming liquid fuel, with the results hereinbefore stated.

The fan underneath the bottom plate of the burner head is similar tothat shown in Fig. 1 but it may be of any suitableconstruction. As shownin Fig. 1 it consists of upper and lower fiat rings A and A connected byan annular series of vertically disposed plates or fans a by therotation of which air will be driven upwardly around the burner headinto and through the film of atomized oil and steam issuing from betweenthe peripheries of the plates A and A of the burner head for supportingand promoting combustion. In Fig. 4 the upper ends of the vanes or fanblades are secured to the lower plate of the burner head instead ofbeing secured to a flat ring A as in Fig. 1. However, the form of thefan in either case is not essential, as various 'forms may be used.

The vertical shaft to which the burner head is secured may he journaledin ball bearings arranged within the hollow standard F, as shown in Fig.1, or in any desired manner, but said bearings and the means shown forimparting rotary motion to the burner head may be of the form shown orof any desired construction, and as no claim is made to the shafthearings or to the means employed for imparting rotary motion to theburner head and parts associated therewith, further description thereofis deemed unnecessary.

In its broader aspects my invention resides essentially in providingsimple and efficient means, associated with the feed-pipe and rotatingatomizing device of a rotary oil burner or the like, whereby a jet orets of steam may be injected into the fuel oil as it is delivered to theburner and a thorough atomization of the oil and the admixture of steamtherewith etfected and a. highly inflammable gaseous mixture producedand thrown out by the rotating atomizing device into the combustionchamber, thus promoting combustion and preventing the tormation anddeposit of soot or carbon on the rotating burner head or atomizer. Theword oil as used herein is intended to include any liquid fuel adaptedfor admixture with steam, while the word vapor applies to vaporizedliquid or steam.

It will be understood of course that various changes may be made in thedetails and arrangement of parts without departing from the spirit andscope of my invention, and I therefore do not desire to be limited inthe appended claims to the specific form and arran ement of parts shownand described.

I-Taving thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. An atomizing device for rotary oil burners revolubly mounted on avertical hollow shaft, said device comprising top and bottom plateshaving substantially concave confronting surfacesand arranged to form acentrally disposed oil and vapor receiving chamber and a restrictedperipheral discharge passage in open communication with said chamber, afuel feed pi e extending up through said hollow shaft liaving mountedthereon within said chamber a nozzle having depending discharge tubesleading from a uel and steam mixing chamber therein into said oil andvapor receiving chamber, and means for conducting steam into said mixingchamber at the point of delivery of liquid fuel therein.

2. In a liquid fuel burner, a burner head revolubly mounted on avertical hollow shaft,

'a stationary fuel feed pipe within said shaft carrying on its upper enda discharge nozzle centrally arranged between top and bottom plateshaving their peripheries spaced apart so as to providea restrictedperipheral discharge passage in open communication with a centrallydisposed oil and vapor receiving chamber, said nozzle having an oil andvapor mixing chamber therein and said feed pipe extending up throughsaid shaft into said mixing chamber, and means for introducing steaminto said mixing chamber for admixture with the liquid fuel therein.

3. The combination, in a rotary oil burner, of an atomizing deviceincluding spaced top and bottom plates revolubly mounted on a verticalshaft so as to provide a centrally disposed oil and vapor receivingchamber and a restricted peripheral discharge passage, :1

fuel feed pipe extending into the space be tween said plates andcarrying a discharge nozzle having a liquid fuel and vapor mixingchamber therein into which the delivery end of said feed pipe protrudes,and means for introducing steam into the liquid fuel as it enters saidmixing chamber.

4. The combination, in a rotary oil burner, of an atomizing deviceincluding spaced top and bottom plates revolubly mounted on a hollowshaft so as to provide a centrally disposed oil and vapor receivingchamber and a restricted peripheral discharge passage, a

fuel feed pipe extending up through said shaft into said chamber andcarrying a discharge nozzle having a liquid fuel. and vapor mixingchamber therein into which the li uid fuel is discharged, and a pipewithin said eed pipe for introducing steam into said mixing chamber.

5. In a rotary oil burner, an atomizing device comprising annular topand bottom plates with opposed concave surfaces revolubly mounted on avertical shaft so as to provide a centrally disposed oil and vaporreceiving chamber and having their peripheries spaced apart so as toprovide a restricted peripheral discharge passage in open communicationwith said chamber, a fuel feed pipe carrying a discharge nozzlecentrally arranged between said plates within said chamber and having aliquid fuel and vapor mixing chamber therein into which the liquid fuelis discharged, and means for introducing steam into said mixing chamberfor admixture with the liquid fuel therein.

6. The combination in a rotary oil burner, of a burner head revolublymounted on a hollow shaft and having a centrally disposed oil and vaporreceiving chamber therein, an oil feed pipe extending up through saidshaft, a discharge nozzle fixed on said feed pipe within said chamberand having a fuel receiving and mixing chamber therein into which theliquid fuel is discharged, and a pipe within said feed pipe andassociated means for pre-heating water and introducing steam into saidmixing chamber.

7. In a rotary oil burner, a rotary head having means thereon fordistributing liquid fuel by centrifugal force, said head having top andbottom plates withopposed concave surfaces providing an inwardlyenlarging oil and vapor receiving chamber in open communication with arestricted peripheral discharge passage and enclosing therebetwecn astationary fuel discharge nozzle, said nozzle being of substantiallysemi-globular form and having a liquid fuel and steam mixing chambertherein, and tubes of the Venturi type for discharging jets ofcommingled oil and steam into said oil and vapor receiving chamber andmeans for introducing liquid fuel and steam into said mixing chamber.

, 8. The combination, in a liquid fuel burner, of an atomizing devicecomprising a revoluble burner head having an oil and vapor receivingchamber therein and a restricted peripheral discharge passage in opencommunication with said chamber, a liquid fuel and vapor mixing devicewithin said chamber of approximately semi-globular form having a mixingchamber therein and depending tubes of the Venturi type, for dischargingjets of commingled oil and steam onto and around the central part of thebottom of said receiving chamber. means for conducting liquid fuel intosaid mixing device, and means for discharge passage in opencommunication with said chamber, a liquid fuel feed pipe protruding intosaid chamber, a mixing device mounted on said feed pipe, a water supplypipe and means associated therewith for utilizing the heat of the burnerto generate steam; the latter pipe terminating within said mixing devicein close proximity to and adapted to inject steam into the liquid fuelat the point of delivery thereof into said mixing device, and means fordischarging jets of commingled fuel and steam from said mixing deviceintosaid heating and mixing chamber, whereby a thorough admixture of thefuel and steam is effected and the mixture vaporized and discharged in athin film into a combustion chamber.

10. In a liquid fuel burner, a rotary burner head having an oil andvapor receiving chamber therein and a restricted peripheral dischargepassage in open communication with said oil and vapor receiving chamberand arranged to discharge commingled vaporized fuel and steam into anencompass ng combustion chamber, a fuel and steam mixing dev1ce withinsaid receiving chamber, an oil feed pipe protruding into said mixmgdevice, and

a steam pipe having its delivery end arranged.

to discharge into the fuel issuing from said feed pipe at the point ofdelivery of fuel mto said mixing device, for comminglmg o 1l and steam,and means for discharging commingled oil and steam from said mixingdevice into said receiving chamber.

11. In a liquid fuel burner, a rotary atomizing device having acentrally disposed liquid fuel and vapor heating and mixing chambertherein in open communication with a surrounding portion or passage-waywhich gradually diminishes in size toward its periphery, the peripheralportion thereof forming a restricted discharge passage, a combustionchamber encompassing said device, a liquid fuel feed pipe having itsdelivery end protruding into said heating and mixing chamber, and meansfor injecting steam into the liquid fuel at the point of deliverythereof into said heating and mixing chamber, whereby a thoroughadmixture of the fuel and steam is effected and the mixture vaporizedand discharged in a thin film into said combustion chamber.

12. In a liquidfuel burner, a rotary atomizing device of circular formhaving a centrally disposed and enlarged liquid fuel and vapor heatingand mixing chamber therein in open communication with a surroundingortion or passage-way of gradually diminishing capacity toward itsperiphery and ter minating in a restricted peripheral discharge passage,a combustion chamber encompassing said device, a fuel and steam mixingdevice within said heating and mixing chamber, a fuel feed pipeprotruding into said mixing device, and means for injecting steam intothe fuel at the point of delivery thereof into said mixing device, thelatter device having means thereon for discharging jets of commingledfuel and steam into said heating and mixing chamber, whereby a thoroughadmixture of of the fuel and steam is effected and the mixturevaporizedand discharged in a thin film into said combustion chamber.

13. A liquid fuel burner comprising a rotary shaft carrying an atomizingdevice having an inwardly enlarging oil and vapor heating and mixingchamber therein and a restricted peripheral discharge passage in opencommunication with said chamber, a central- 1y disposed hollow li uidfuel and steam mix- 1 ing device within said chamber, a fuel feed pipefor conducting liquid fuel into said mixing device, a combustion chamberencompassing said' atomizing' device, means associated with saidcombustion chamber for discharge" jets of commingled oil and steam- .mtosaid heating and mixing chamber.

14. A liquid fuel burner comprising a rotary burner head composed ofsubstantially circular plates of approximately concavoconvex formsecured together with their concave surfaces confronting and theirperipheries slightly spacedapart so as to provide a centrally disposedheating and vaporizing chamber which is gradually enlarged toward itscenter and a restricted peripheral discharge passage in opencommunication with said chamber, a fuel feed pipe for delivering liquidfuel into said heating and vaporizing chamber, a combustion chamberencompassing said burner head, and a water supply pipe having a partthereof arranged within said combustion chamber and its delivery endprotruding into saidcheating and vaporizing chamber and terminating inclose proximity to the delivery end of said feed pipe, whereby the heatof the burner is utilized for heating the water and generating steam fordelivery into the liquid fuel in coincidence with and at the point ofdelivery of the fuel into said heating and vaporizing chamber.

In testimony whereof I aflix my signature.

JOHN SCHEMINGER, JR.

